Earth is about 4.6 billion years old. If 235U is 0.72%abundant today, what was the ratio
Chapter 12, Problem 54(choose chapter or problem)
Earth is about 4.6 billion years old. If 235U is 0.72%abundant today, what was the ratio of 235/238isotopes when Earth formed? (Hint: Look in Appendix8 for useful information.)
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